power: qpnp-smbcharger: Add a delay to switch into HVDCP 2.0 mode

Add a design required delay to allow HVDCP to switch into
2.0 mode before forcing it to 9V. There is a possibility
of a UV without this delay.

Change-Id: I46cfb4296c734ea0dc768bbd6874fe55b644d60c
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>